I remember when I went to play at Oishi's house. Yokota witnessed Oishi's mother, Sasuke, in her underwear. Decapan hides your stomach completely. Yokota is shocked by the sculpting that has nothing to do with fashion. The unprotected underwear that was not supposed to be seen was much more graphic and erotic than the underwear of the beautiful woman you see on the net. From that day on, Yokota would visit Oishi's house on several occasions and steal Sasuke's underwear. Before he knew it, he had come to think that Sasuke was the only one to offer his virginity.